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Conversion Tables US vs Metrics

Wheel Diameter
Inches mm
6 152.4
7 177.8
8 203.2
10 254
12 304.8
14 355.6
16 406.4
Wheel Width
Inches mm
1 3/4 44.5
2 50.8
2 1/2 63.5
2 3/4 69.9
3 76.2
Bore Diameter
Inches mm
5/16 7.9
 3/8 9.5
 1/2 12.7
 5/8 15.9
 3/4 19.1
1     25.4
1 1/8 28.6
1 3/8 34.9

Tread Width
Inches mm
1.25 31.8
1.5 38.1
1.75 44.5
2 50.8
2.75 69.9
Hub Length
Inches mm
1 3/4 44.5
2 1/4 57.2
2 3/8 60.3
2 1/2 63.5
2 5/8 66.7
3 76.2
3 1/4 82.6
3 3/4 95.3
4 101.6
4 1/2 114.3
Weight Load Capacity
lbs kg
330 150
350 159
375 170
385 175
390 177
440 200
450 204
500 227
550 249
650 295
700 318
750 340
850 386
1000 454
1100 499